140642 has 4 divisors (see below), whose sum is σ = 210966. Its totient is φ = 70320.

The previous prime is 140639. The next prime is 140659. The reversal of 140642 is 246041.

140642 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 83521 + 57121 = 289^2 + 239^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 140642.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35159 + ... + 35162.

2¹⁴⁰⁶⁴² is an apocalyptic number.

140642 is a deficient number, since it is larger than the sum of its proper divisors (70324).

140642 is an equidigital number, since it uses as much as digits as its factorization.

140642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70323.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 140642 is about 375.0226659817. The cubic root of 140642 is about 52.0041909837.

Subtracting from 140642 its sum of digits (17), we obtain a square (140625 = 375²).

Adding to 140642 its reverse (246041), we get a palindrome (386683).

The spelling of 140642 in words is "one hundred forty thousand, six hundred forty-two".